.content {
    /* 给定容器宽高度 */
    width: 600px;
    overflow: hidden;
    height: 300px;
    position: relative;
    background-color: #ccc;
}

img {
    height: 100%;
    width: 100%;
}

.points {
    position: absolute;
    z-index: 5;
    list-style: none;
    width: 10%;
    display: flex;
    justify-content: center;
    align-items: center;
    /* background-color: hsla(0, 0%, 0%, 0.2); */
    bottom: 5px;
    left: 40%;
    height: 20px;
    border-radius: 25px;
    right: 40%;
}

.points li {
    cursor: pointer;
    display: inline-block;
    width: 10px;
    height: 10px;
    margin: 0px auto;
    border-radius: 15px;
    background-color: #fff;
}

.active {
    background-color: #898989 !important;
}

.next,
.prev {
    appearance: menu;
    margin: 0 auto;
    width: 25px;
    float: left;
    height: 50px;
    position: absolute;
    line-height: 40px;
    text-align: center;
    font-family: "宋体";
    color: aliceblue;
    z-index: 999;
    background-color: hsla(0, 0%, 0%, 0.1);
    top: 45%;
    -webkit-appearance: button;
    cursor: pointer;
    opacity: 1;
    display: none;
}

.next {
    right: 0px;
}

.content:hover .prev {
    display: block;
}

.content:hover .next {
    display: block;
}

.prev:hover {
    background-color: hsla(0, 0%, 0%, 0.5);
}

.next:hover {
    background-color: hsla(0, 0%, 0%, 0.5);
}